CN114779434A - Camera lens - Google Patents
Camera lens Download PDFInfo
- Publication number
- CN114779434A CN114779434A CN202210297336.3A CN202210297336A CN114779434A CN 114779434 A CN114779434 A CN 114779434A CN 202210297336 A CN202210297336 A CN 202210297336A CN 114779434 A CN114779434 A CN 114779434A
- Authority
- CN
- China
- Prior art keywords
- lens
- incident side
- imaging
- close
- refractive power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003384 imaging method Methods 0.000 claims abstract description 132
- 230000003287 optical effect Effects 0.000 claims abstract description 48
- 230000004075 alteration Effects 0.000 description 28
- 201000009310 astigmatism Diseases 0.000 description 10
- 235000013312 flour Nutrition 0.000 description 8
- 230000014509 gene expression Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012634 optical imaging Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
Abstract
The invention provides a camera lens. The imaging lens includes: the first lens has positive refractive power, the surface of the first lens close to the incident side is a convex surface, and the surface of the first lens close to the emergent side is a concave surface; the second lens has negative refractive power, the surface of the second lens close to the incident side is a convex surface, and the surface of the second lens close to the emergent side is a concave surface; the third lens element with positive refractive power has a convex surface on the incident side and a convex surface on the emergent side; the fourth lens has negative refractive power, the surface of the fourth lens close to the incident side is a concave surface, and the surface of the fourth lens close to the emergent side is a concave surface; the fifth lens element with positive refractive power; the on-axis distance TTL from the surface close to the incident side of the first lens to the imaging surface and the half ImgH of the diagonal length of the effective pixel area on the imaging surface satisfy the following condition: TTL/ImgH < 1.3; the air interval T34 between the third lens and the fourth lens on the optical axis and the central thickness CT4 of the fourth lens on the optical axis satisfy that: 1.3< T34/CT4< 1.8. The invention solves the problem that the large image plane, the large aperture and the ultrathin lens in the camera lens in the prior art are difficult to realize simultaneously.
Description
Technical Field
The invention relates to the technical field of optical imaging equipment, in particular to a camera lens.
Background
With the rapid development of the photographing technical field, people have higher and higher requirements on the photographing quality of the camera lens of the mobile phone. Meanwhile, due to the development of the image sensor processing technologies such as CCD and CMOS, the number of pixels on a single image sensor is increased and the size of the single pixel is reduced, so that higher requirements are provided for the imaging quality of the camera lens. In order to facilitate the application of the camera lens to ultra-thin electronic products, the miniaturization of the camera lens needs to be ensured, and meanwhile, the performance of the camera lens needs to be ensured, so that the characteristics of a large image plane, a large aperture and the like are met.
That is to say, the imaging lens in the prior art has the problem that large image plane, large aperture and ultrathin are difficult to realize simultaneously.
Disclosure of Invention
The invention mainly aims to provide a camera lens, which solves the problem that the camera lens in the prior art has large image plane, large aperture and ultrathin property and is difficult to realize at the same time.
In order to achieve the above object, the present invention provides an image pickup lens, sequentially comprising, from a light incident side to a light exiting side: the first lens element with positive refractive power has a convex surface on the incident side and a concave surface on the emergent side; the second lens has negative refractive power, the surface of the second lens close to the incident side is a convex surface, and the surface of the second lens close to the emergent side is a concave surface; the third lens has positive refractive power, and the surface of the third lens close to the incident side is a convex surface, and the surface of the third lens close to the emergent side is a convex surface; the fourth lens element with negative refractive power has a concave surface on the incident side and a concave surface on the emergent side; the fifth lens element with positive refractive power has a convex surface on the incident side and a concave surface on the emergent side; the sixth lens element with negative refractive power has a convex surface on the incident side and a concave surface on the emergent side; the on-axis distance TTL from the surface close to the incident side of the first lens to the imaging surface and the half ImgH of the diagonal length of the effective pixel area on the imaging surface satisfy the following conditions: TTL/ImgH is less than 1.3; the air space T34 between the third lens and the fourth lens on the optical axis and the central thickness CT4 of the fourth lens on the optical axis satisfy that: 1.3< T34/CT4< 1.8.
Further, the effective focal length f1 of the first lens, the effective focal length f3 of the third lens and the effective focal length f5 of the fifth lens satisfy: 1.0< f3/(f1+ f5) < 1.5.
Further, the effective focal length f2 of the second lens, the effective focal length f4 of the fourth lens and the effective focal length f6 of the sixth lens satisfy: 2.0< f2/(f4+ f6) < 2.6.
Further, the radius of curvature R1 of the surface on the incident side of the first lens, the radius of curvature R2 of the surface on the exit side of the first lens, the radius of curvature R3 of the surface on the incident side of the second lens, and the radius of curvature R4 of the surface on the exit side of the second lens satisfy: 1.1< R2/R1-R3/R4< 1.5.
Further, a curvature radius R5 of a surface of the third lens on the incident side and a curvature radius R6 of a surface of the third lens on the exit side satisfy: 1.2< (R5-R6)/(R5+ R6) < 1.6.
Further, a curvature radius R7 of a surface of the fourth lens closer to the incident side and a curvature radius R8 of a surface of the fourth lens closer to the exit side satisfy: 1.8< (R8-R7)/(R8+ R7) < 4.8.
Further, the curvature radius R11 of the surface of the sixth lens on the incident side, the curvature radius R12 of the surface of the sixth lens on the exit side, and the curvature radius R9 of the surface of the fifth lens on the incident side satisfy: 1.0< (R11+ R12)/R9< 1.5.
Further, a combined focal length f12 of the first lens and the second lens and a combined focal length f56 of the fifth lens and the sixth lens satisfy: 1.8< f56/f12< 3.4.
Further, an on-axis distance SAG22 between an intersection point of the surface of the second lens close to the exit side and the optical axis to an effective radius vertex of the surface of the second lens close to the exit side, an on-axis distance SAG41 between an intersection point of the surface of the fourth lens close to the incident side and the optical axis to an effective radius vertex of the surface of the fourth lens close to the incident side, and an on-axis distance SAG42 between an intersection point of the surface of the fourth lens close to the exit side and the optical axis to an effective radius vertex of the surface of the fourth lens close to the exit side satisfy: -4.2< (SAG41+ SAG42)/SAG22< -3.6.
Further, the combined focal length f34 of the third lens and the fourth lens, the on-axis distance SAG61 from the intersection point of the surface of the sixth lens close to the incident side and the optical axis to the effective radius vertex of the surface of the sixth lens close to the incident side, and the on-axis distance SAG62 from the intersection point of the surface of the sixth lens close to the exit side and the optical axis to the effective radius vertex of the surface of the sixth lens close to the exit side satisfy: 7.2< f34/(SAG61+ SAG62) < 9.0; the center thickness CT5 of the fifth lens on the optical axis, the on-axis distance SAG51 from the intersection point of the surface of the fifth lens close to the incident side and the optical axis to the effective radius vertex of the surface of the fifth lens close to the incident side and the on-axis distance SAG52 from the intersection point of the surface of the fifth lens close to the exit side and the optical axis to the effective radius vertex of the surface of the fifth lens close to the exit side satisfy the following conditions: 0.5< (SAG51-SAG52)/CT5< 0.9.
Further, the center thickness CT5 of the fifth lens on the optical axis, the air interval T56 of the fifth lens and the sixth lens on the optical axis, the edge thickness ET5 of the fifth lens and the edge thickness ET6 of the sixth lens satisfy: 1.5< (CT5+ T56)/(ET5+ ET6) < 2.4.
By applying the technical scheme of the invention, the camera lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from a light incidence side to a light emergence side; the first lens has positive refractive power, the surface of the first lens close to the incident side is a convex surface, and the surface of the first lens close to the emergent side is a concave surface; the second lens has negative refractive power, the surface of the second lens close to the incident side is a convex surface, and the surface of the second lens close to the emergent side is a concave surface; the third lens element with positive refractive power has a convex surface on the incident side and a convex surface on the exit side; the fourth lens element with negative refractive power has a concave surface on the incident side and a concave surface on the emergent side; the fifth lens element with positive refractive power has a convex surface on the incident side and a concave surface on the emergent side; the sixth lens element with negative refractive power has a convex surface on the incident side and a concave surface on the emergent side; the on-axis distance TTL from the surface close to the incident side of the first lens to the imaging surface and the half ImgH of the diagonal length of the effective pixel area on the imaging surface satisfy the following conditions: TTL/ImgH < 1.3; the air interval T34 between the third lens and the fourth lens on the optical axis and the central thickness CT4 of the fourth lens on the optical axis satisfy that: 1.3< T34/CT4< 1.8.
The lens has the advantages that the stable transition of light rays is facilitated through reasonably configuring the refractive power and the surface type of each lens, the stability of imaging is ensured, meanwhile, the shape and the size of each lens can be reasonably planned, and the whole size of the camera lens is compressed so as to realize miniaturization and large aperture. The characteristics of ultra-thin and large image surface of the camera lens can be realized by constraining the ratio of the on-axis distance TTL from the surface close to the incident side of the first lens to the imaging surface to the half of the diagonal length ImgH of the effective pixel area on the imaging surface within a reasonable range. By restricting the ratio between the air interval T34 of the third lens and the fourth lens on the optical axis and the central thickness CT4 of the fourth lens on the optical axis, the curvature of field of each field can be controlled within a reasonable range, and the compression of the size of the imaging lens is facilitated.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiment(s) of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic view showing a configuration of an imaging lens according to a first example of the present invention;
fig. 2 to 5 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens in fig. 1;
fig. 6 is a schematic view showing a configuration of an imaging lens according to a second example of the present invention;
fig. 7 to 10 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens in fig. 6;
fig. 11 is a schematic view showing a configuration of an imaging lens according to a third example of the present invention;
fig. 12 to 15 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens in fig. 11;
fig. 16 is a schematic view showing a configuration of an imaging lens of example four of the present invention;
fig. 17 to 20 show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens in fig. 16;
fig. 21 is a schematic view showing a configuration of an imaging lens of example five of the present invention;
fig. 22 to 25 show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the imaging lens in fig. 21, respectively.
Wherein the figures include the following reference numerals:
STO, diaphragm; e1, first lens; s1, a surface of the first lens near the incident side; s2, the surface of the first lens on the emission side; e2, second lens; s3, a surface of the second lens close to the incident side; s4, the surface of the second lens close to the emergent side; e3, third lens; s5, a surface of the third lens near the incident side; s6, the surface of the third lens close to the emergent side; e4, fourth lens; s7, a surface of the fourth lens close to the incident side; s8, the surface of the fourth lens close to the emergent side; e5, fifth lens; s9, a surface of the fifth lens near the incident side; s10, the surface of the fifth lens close to the emergent side; e6, sixth lens; s11, a surface of the sixth lens element on the incident side; s12, a surface of the sixth lens near the exit side; e7, optical filters; s13, the surface of the optical filter close to the incident side; s14, the surface of the filter close to the emergent side; and S15, imaging surface.
Detailed Description
It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
In the present invention, unless stated to the contrary, use of the terms of orientation such as "upper, lower, top, bottom" or the like, generally refer to the orientation as shown in the drawings, or to the component itself in a vertical, perpendicular, or gravitational orientation; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional terms are not intended to limit the invention.
It should be noted that in this specification the expressions first, second, third etc. are only used to distinguish one feature from another, and do not represent any limitation on the features. Thus, the first lens discussed below may also be referred to as the second lens or the third lens without departing from the teachings of the present application.
In the drawings, the thickness, size, and shape of the lens have been slightly exaggerated for convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and not drawn to scale.
Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens on the light incident side becomes the surface of the lens on the light incident side, and the surface of each lens on the light emitting side is referred to as the surface of the lens on the light emitting side. The judgment of the surface shape of the paraxial region can be made by judging whether the surface shape is a concave or convex shape by the R value (R denotes the radius of curvature of the paraxial region, and usually denotes the R value in a lens database (lens data) in optical software) or not, according to the judgment method of a person ordinarily skilled in the art. On the surface close to the incident side, when the R value is positive, the surface is judged to be convex, and when the R value is negative, the surface is judged to be concave; the surface closer to the emission side is determined to be concave when the R value is positive, and convex when the R value is negative.
The invention provides a camera lens, which aims to solve the problem that a camera lens in the prior art has large image plane, large aperture and ultrathin property and is difficult to realize simultaneously.
As shown in fig. 1 to 25, the camera lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens in sequence from a light incident side to a light emergent side; the first lens has positive refractive power, the surface of the first lens close to the incident side is a convex surface, and the surface of the first lens close to the emergent side is a concave surface; the second lens has negative refractive power, the surface of the second lens close to the incident side is a convex surface, and the surface close to the emergent side is a concave surface; the third lens element with positive refractive power has a convex surface on the incident side and a convex surface on the emergent side; the fourth lens element with negative refractive power has a concave surface on the incident side and a concave surface on the emergent side; the fifth lens element with positive refractive power has a convex surface on the incident side and a concave surface on the emergent side; the sixth lens element with negative refractive power has a convex surface on the incident side and a concave surface on the emergent side; wherein, the on-axis distance TTL from the surface close to the incident side of the first lens to the imaging surface and the half ImgH of the diagonal length of the effective pixel area on the imaging surface are satisfied: TTL/ImgH is less than 1.3; the air interval T34 between the third lens and the fourth lens on the optical axis and the central thickness CT4 of the fourth lens on the optical axis satisfy that: 1.3< T34/CT4< 1.8.
Preferably, 1.3< T34/CT4< 1.6.
The lens has the advantages that the refractive power and the surface shape of each lens are reasonably configured, so that stable transition of light rays is facilitated, the stability of imaging is guaranteed, meanwhile, the shape and the size of each lens can be reasonably planned, and the whole size of the camera lens is compressed, so that miniaturization and large aperture are realized. The characteristics of ultra-thin and large image surface of the camera lens can be realized by constraining the ratio of the on-axis distance TTL from the surface close to the incident side of the first lens to the imaging surface to the half of the diagonal length ImgH of the effective pixel area on the imaging surface within a reasonable range. By restricting the ratio between the air interval T34 of the third lens and the fourth lens on the optical axis and the central thickness CT4 of the fourth lens on the optical axis, the curvature of field of each field can be controlled within a reasonable range, and the compression of the size of the imaging lens is facilitated.
In the present embodiment, the effective focal length f1 of the first lens, the effective focal length f3 of the third lens, and the effective focal length f5 of the fifth lens satisfy: 1.0< f3/(f1+ f5) < 1.5. The condition formula is satisfied, the refractive power of the whole system can be reasonably distributed, and the sensitivity of the system is reduced. Preferably, 1.1< f3/(f1+ f5) < 1.2.
In the present embodiment, the effective focal length f2 of the second lens, the effective focal length f4 of the fourth lens, and the effective focal length f6 of the sixth lens satisfy: 2.0< f2/(f4+ f6) < 2.6. The conditional expression is satisfied, the contribution of each lens to the aberration of the system can be reasonably controlled, and the system has better imaging quality. Preferably, 2.1< f2/(f4+ f6) < 2.5.
In the present embodiment, the radius of curvature R1 of the surface on the incident side of the first lens, the radius of curvature R2 of the surface on the exit side of the first lens, the radius of curvature R3 of the surface on the incident side of the second lens, and the radius of curvature R4 of the surface on the exit side of the second lens satisfy: 1.1< R2/R1-R3/R4< 1.5. The conditional expression is satisfied, so that CRA matching of the pick-up lens is ensured, curvature of field of the pick-up lens is corrected, and imaging definition requirements of each view field are satisfied. Preferably, 1.2< R2/R1-R3/R4< 1.3.
In the present embodiment, a radius of curvature R5 of the surface of the third lens on the incident side and a radius of curvature R6 of the surface of the third lens on the exit side satisfy: 1.2< (R5-R6)/(R5+ R6) < 1.6. Satisfying this conditional expression, the workability of the third lens can be reasonably controlled, and mass productivity is ensured. Preferably, 1.2< (R5-R6)/(R5+ R6) < 1.4.
In the present embodiment, a curvature radius R7 of a surface of the fourth lens closer to the incident side and a curvature radius R8 of a surface of the fourth lens closer to the exit side satisfy: 1.8< (R8-R7)/(R8+ R7) < 4.8. The method can reasonably control the deflection angle of the marginal light of the system and ensure the imaging quality. Preferably, 1.9< (R8-R7)/(R8+ R7) < 4.7.
In the present embodiment, the radius of curvature R11 of the surface of the sixth lens on the incident side, the radius of curvature R12 of the surface of the sixth lens on the exit side, and the radius of curvature R9 of the surface of the fifth lens on the incident side satisfy: 1.0< (R11+ R12)/R9< 1.5. The field curvature of the system can be reasonably distributed by meeting the conditional expression, so that the field curvature of the system is in a certain range. Preferably, 1.1< (R11+ R12)/R9< 1.3.
In the present embodiment, a combined focal length f12 of the first lens and the second lens and a combined focal length f56 of the fifth lens and the sixth lens satisfy: 1.8< f56/f12< 3.4. The spherical aberration generated by the front lens and the rear lens of the system can be balanced, the spherical aberration of the system can be finely adjusted, and the aberration of the on-axis field of view can be reduced. Preferably, 2.0< f56/f12< 3.3.
In the present embodiment, the on-axis distance SAG22 between the intersection of the surface on the exit side of the second lens and the optical axis to the effective radius vertex of the surface on the exit side of the second lens, the on-axis distance SAG41 between the intersection of the surface on the entrance side of the fourth lens and the optical axis to the effective radius vertex of the surface on the entrance side of the fourth lens, and the on-axis distance SAG42 between the intersection of the surface on the exit side of the fourth lens and the optical axis to the effective radius vertex of the surface on the exit side of the fourth lens satisfy: -4.2< (SAG41+ SAG42)/SAG22< -3.6. The condition is satisfied, which is beneficial to ensuring the processing and forming of the second lens and the fourth lens so as to obtain good imaging effect. An unreasonable ratio may cause difficulty in adjusting the molding surface shape, and the molding surface shape is easily deformed obviously after assembly, so that the imaging quality cannot be ensured. Preferably, -4.1< (SAG41+ SAG42)/SAG22< -3.8.
In the present embodiment, the combined focal length f34 of the third lens and the fourth lens, the on-axis distance SAG61 from the intersection of the surface of the sixth lens on the incident side and the optical axis to the effective radius vertex of the surface of the sixth lens on the incident side, and the on-axis distance SAG62 from the intersection of the surface of the sixth lens on the exit side and the optical axis to the effective radius vertex of the surface of the sixth lens on the exit side satisfy: 7.2< f34/(SAG61+ SAG62) < 9.0. The conditional expression is satisfied, the processing and the forming of the sixth lens can be ensured, and the combined focal length of the third lens and the fourth lens is distributed, so that the light deflection is smoother, and the reduction of aberration is facilitated. Preferably 7.4< f34/(SAG61+ SAG62) < 8.8.
In the present embodiment, the center thickness CT5 of the fifth lens on the optical axis, the on-axis distance SAG51 between the intersection point of the surface of the fifth lens close to the incident side and the optical axis and the effective radius vertex of the surface of the fifth lens close to the incident side, and the on-axis distance SAG52 between the intersection point of the surface of the fifth lens close to the exit side and the optical axis and the effective radius vertex of the surface of the fifth lens close to the exit side satisfy: 0.5< (SAG51-SAG52)/CT5< 0.9. The conditional expression is satisfied, the incident angle of the main light of the fifth lens can be effectively reduced, and the matching degree of the camera lens and the chip can be improved. Preferably, 0.5< (SAG51-SAG52)/CT5< 0.8.
In the present embodiment, the central thickness CT5 of the fifth lens on the optical axis, the air interval T56 between the fifth lens and the sixth lens on the optical axis, the edge thickness ET5 of the fifth lens and the edge thickness ET6 of the sixth lens satisfy: 1.5< (CT5+ T56)/(ET5+ ET6) < 2.4. The condition is satisfied, the influence of ghost images in the system can be effectively reduced, and a better imaging effect can be obtained. Preferably, 1.7< (CT5+ T56)/(ET5+ ET6) < 2.3.
The above-described imaging lens may further optionally include an optical filter for correcting color deviation or a protective glass for protecting a photosensitive element located on the imaging surface.
The imaging lens in the present application may employ a plurality of lenses, for example, the above-described six lenses. By reasonably distributing the refractive power, the surface shape, the center thickness of each lens, the on-axis distance between each lens and the like, the sensitivity of the lens can be effectively reduced, the machinability of the lens can be improved, and the camera lens is more beneficial to production and processing and can be suitable for portable electronic equipment such as smart phones. The left side is the light incident side, and the right side is the light emergent side.
In the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. The aspheric lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated during imaging can be eliminated as much as possible, thereby improving the imaging quality.
However, it will be appreciated by those skilled in the art that the number of lenses making up the imaging lens can be varied without departing from the claimed subject matter to obtain the various results and advantages described in this specification. For example, although six lenses are exemplified in the embodiment, the imaging lens is not limited to including six lenses. The camera lens may also include other numbers of lenses, if desired.
Examples of specific surface types and parameters of the imaging lens applicable to the above embodiments are further described below with reference to the drawings.
It should be noted that any one of the following examples one to five is applicable to the embodiments of the present application.
Example one
As shown in fig. 1 to 5, an imaging lens of the first example of the present application is described. Fig. 1 shows a schematic view of a camera lens structure of example one.
As shown in fig. 1, the camera lens sequentially includes from the light incident side to the light exiting side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.
The first lens element E1 has positive refractive power, and has a convex surface on the incident side S1 and a concave surface on the exit side S2. The second lens element E2 has negative refractive power, and has a convex surface S3 on the incident side and a concave surface S4 on the exit side. The third lens element E3 has positive refractive power, and has a convex surface on the incident side S5 and a convex surface on the exit side S6. The fourth lens element E4 has negative refractive power, and has a concave surface on the incident side S7 and a concave surface on the exit side S8. The fifth lens element E5 has positive refractive power, and a surface S9 of the fifth lens element near the incident side is convex, and a surface S10 of the fifth lens element near the exit side is concave. The sixth lens element E6 has negative refractive power, and has a convex surface on the incident-side surface S11 and a concave surface on the exit-side surface S12. The filter E7 has a surface S13 on the incident side of the filter and a surface S14 on the emission side of the filter. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
In this example, the total effective focal length f of the imaging lens is 5.04mm, the total system length TTL of the imaging lens is 6.20mm, and the image height ImgH is 4.95 mm.
Table 1 shows a basic structural parameter table of the imaging lens of example one, in which the unit of the radius of curvature and the thickness/distance are millimeters (mm).
TABLE 1
In the first example, a surface of any one of the first lens E1 to the sixth lens E6 on the incident side and a surface on the exit side are both aspheric surfaces, and the surface shape of each aspheric lens can be defined by, but is not limited to, the following aspheric surface formula:
wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspherical surface, with c being 1/R (i.e., paraxial curvature c being the reciprocal of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspheric surface. Table 2 below gives the high-order coefficient values A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 that can be used for the aspherical mirrors S1-S12 in example one.
TABLE 2
Fig. 2 shows an axial chromatic aberration curve of the imaging lens of the first example, which shows the deviation of the convergent focal points of the light rays of different wavelengths after passing through the imaging lens. Fig. 3 shows astigmatism curves of the imaging lens of the first example, which represent meridional field curvature and sagittal field curvature. Fig. 4 shows distortion curves of the imaging lens of example one, which indicate distortion magnitude values corresponding to different angles of view. Fig. 5 shows a chromatic aberration of magnification curve of the imaging lens of the first example, which represents the deviation of different image heights on the image formation plane after the light ray passes through the imaging lens.
As can be seen from fig. 2 to 5, the imaging lens according to the first example can achieve good imaging quality.
Example two
As shown in fig. 6 to 10, an imaging lens of example two of the present application is described. In this example and the following examples, descriptions of parts similar to example one will be omitted for the sake of brevity. Fig. 6 shows a schematic diagram of the imaging lens structure of example two.
As shown in fig. 6, the camera lens sequentially includes from the light incident side to the light exiting side: an aperture stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.
The first lens element E1 has positive refractive power, and the surface S1 of the first lens element near the incident side is convex, and the surface S2 of the first lens element near the exit side is concave. The second lens element E2 has negative refractive power, and its surface S3 on the incident side is convex, and its surface S4 on the exit side is concave. The third lens element E3 has positive refractive power, and has a convex surface on the incident side S5 and a convex surface on the exit side S6. The fourth lens element E4 has negative refractive power, and has a concave surface on the incident side S7 and a concave surface on the exit side S8. The fifth lens element E5 has positive refractive power, and a surface S9 of the fifth lens element near the incident side is convex, and a surface S10 of the fifth lens element near the exit side is concave. The sixth lens element E6 has negative refractive power, and has a convex surface on the incident-side surface S11 and a concave surface on the exit-side surface S12. The filter E7 has a surface S13 on the incident side of the filter and a surface S14 on the emission side of the filter. The light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging surface S15.
In this example, the total effective focal length f of the imaging lens is 5.03mm, the total system length TTL of the imaging lens is 6.19mm, and the image height ImgH is 4.80 mm.
Table 3 shows a basic structural parameter table of the imaging lens of example two, in which the unit of the radius of curvature and the thickness/distance are millimeters (mm).
TABLE 3
Table 4 shows the high-order term coefficients that can be used for each aspherical mirror in example two, wherein each aspherical mirror type can be defined by formula (1) given in example one above.
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | -1.0711E-02 | 1.0410E-01 | -5.6177E-01 | 1.9360E+00 | -4.4777E+00 | 7.2057E+00 | -8.2565E+00 |
| S2 | -1.5449E-02 | -3.9933E-02 | 1.9088E-01 | -4.4258E-01 | 3.4330E-01 | 8.8419E-01 | -3.1489E+00 |
| S3 | -5.6145E-02 | 1.2863E-01 | -9.3772E-01 | 4.4764E+00 | -1.4050E+01 | 3.0578E+01 | -4.7343E+01 |
| S4 | -1.7851E-02 | -1.8073E-01 | 2.0151E+00 | -1.2613E+01 | 5.1239E+01 | -1.4197E+02 | 2.7693E+02 |
| S5 | -4.7566E-02 | 3.4416E-01 | -2.7421E+00 | 1.3551E+01 | -4.5599E+01 | 1.0826E+02 | -1.8531E+02 |
| S6 | -3.7541E-02 | 1.6048E-02 | -2.8113E-02 | 7.9229E-02 | -6.8012E-01 | 2.6088E+00 | -5.6198E+00 |
| S7 | -1.5090E-01 | 1.4697E-01 | -6.9375E-02 | -3.1861E-01 | 1.0349E+00 | -1.6882E+00 | 1.7997E+00 |
| S8 | -2.2341E-01 | 2.3873E-01 | -2.6457E-01 | 1.8436E-01 | -2.2421E-02 | -9.3196E-02 | 1.0406E-01 |
| S9 | -7.8277E-02 | 8.4601E-02 | -1.1339E-01 | 1.1330E-01 | -9.0698E-02 | 5.6325E-02 | -2.6134E-02 |
| S10 | -9.9089E-04 | 3.9084E-02 | -3.7318E-02 | 1.6128E-02 | -4.5323E-03 | 1.3150E-03 | -5.1838E-04 |
| S11 | -2.4554E-01 | 1.1950E-01 | -3.1119E-02 | -4.4430E-03 | 7.4227E-03 | -3.2291E-03 | 8.3353E-04 |
| S12 | -2.7764E-01 | 1.8081E-01 | -1.0043E-01 | 4.3749E-02 | -1.4583E-02 | 3.6471E-03 | -6.7665E-04 |
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | 6.8194E+00 | -4.0678E+00 | 1.7353E+00 | -5.1607E-01 | 1.0159E-01 | -1.1893E-02 | 6.2673E-04 |
| S2 | 4.8774E+00 | -4.6547E+00 | 2.9385E+00 | -1.2349E+00 | 3.3317E-01 | -5.2320E-02 | 3.6396E-03 |
| S3 | 5.2776E+01 | -4.2401E+01 | 2.4289E+01 | -9.6619E+00 | 2.5324E+00 | -3.9272E-01 | 2.7264E-02 |
| S4 | -3.8648E+02 | 3.8738E+02 | -2.7638E+02 | 1.3687E+02 | -4.4693E+01 | 8.6475E+00 | -7.5062E-01 |
| S5 | 2.3115E+02 | -2.1025E+02 | 1.3797E+02 | -6.3617E+01 | 1.9561E+01 | -3.6025E+00 | 3.0068E-01 |
| S6 | 7.7236E+00 | -7.1410E+00 | 4.5133E+00 | -1.9281E+00 | 5.3323E-01 | -8.6252E-02 | 6.1999E-03 |
| S7 | -1.3405E+00 | 7.1632E-01 | -2.7590E-01 | 7.5232E-02 | -1.3825E-02 | 1.5375E-03 | -7.8155E-05 |
| S8 | -5.9268E-02 | 2.1048E-02 | -4.8685E-03 | 7.2851E-04 | -6.7115E-05 | 3.3720E-06 | -6.6756E-08 |
| S9 | 8.8725E-03 | -2.1742E-03 | 3.7808E-04 | -4.5325E-05 | 3.5518E-06 | -1.6344E-07 | 3.3446E-09 |
| S10 | 1.8359E-04 | -4.5503E-05 | 7.5690E-06 | -8.3361E-07 | 5.8511E-08 | -2.3748E-09 | 4.2459E-11 |
| S11 | -1.4394E-04 | 1.7241E-05 | -1.4404E-06 | 8.2491E-08 | -3.0909E-09 | 6.8314E-11 | -6.7565E-13 |
| S12 | 9.2393E-05 | -9.1936E-06 | 6.5576E-07 | -3.2560E-08 | 1.0665E-09 | -2.0685E-11 | 1.7971E-13 |
TABLE 4
Fig. 7 shows an axial chromatic aberration curve of the imaging lens of example two, which shows the deviation of the convergent focus of light rays of different wavelengths after passing through the imaging lens. Fig. 8 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of example two. Fig. 9 shows distortion curves of the imaging lens of example two, which show values of distortion magnitudes corresponding to different angles of view. Fig. 10 shows a chromatic aberration of magnification curve of the imaging lens of the second example, which shows the deviation of different image heights on the image forming surface after the light passes through the imaging lens.
As can be seen from fig. 7 to 10, the imaging lens according to example two can achieve good imaging quality.
EXAMPLE III
As shown in fig. 11 to 15, an imaging lens of example three of the present application is described. Fig. 11 shows a schematic diagram of an imaging lens structure of example three.
As shown in fig. 11, the camera lens sequentially includes from the light incident side to the light exiting side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.
The first lens element E1 has positive refractive power, and the surface S1 of the first lens element near the incident side is convex, and the surface S2 of the first lens element near the exit side is concave. The second lens element E2 has negative refractive power, and has a convex surface S3 on the incident side and a concave surface S4 on the exit side. The third lens element E3 has positive refractive power, and has a convex surface on the incident side S5 and a convex surface on the exit side S6. The fourth lens element E4 has negative refractive power, and has a concave surface on the incident side S7 and a concave surface on the exit side S8. The fifth lens element E5 has positive refractive power, and a surface S9 of the fifth lens element near the incident side is convex, and a surface S10 of the fifth lens element near the exit side is concave. The sixth lens element E6 has negative refractive power, and has a convex surface on the incident-side surface S11 and a concave surface on the exit-side surface S12. The filter E7 has a surface S13 on the incident side of the filter and a surface S14 on the emission side of the filter. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
In this example, the total effective focal length f of the imaging lens is 5.03mm, the total system length TTL of the imaging lens is 6.18mm, and the image height ImgH is 4.90 mm.
Table 5 shows a basic structural parameter table of the imaging lens of example three, in which the unit of the radius of curvature and the thickness/distance are millimeters (mm).
TABLE 5
Table 6 shows the high-order term coefficients that can be used for each aspherical mirror surface in example three, wherein each aspherical mirror surface type can be defined by formula (1) given in example one above.
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | -1.2198E-02 | 1.1927E-01 | -6.4830E-01 | 2.2434E+00 | -5.2034E+00 | 8.3916E+00 | -9.6325E+00 |
| S2 | -1.4450E-02 | -5.1995E-02 | 2.6197E-01 | -7.0272E-01 | 9.6797E-01 | -1.4310E-01 | -1.9644E+00 |
| S3 | -5.6785E-02 | 1.4307E-01 | -1.0501E+00 | 4.9784E+00 | -1.5531E+01 | 3.3612E+01 | -5.1774E+01 |
| S4 | -1.5316E-02 | -2.1401E-01 | 2.3337E+00 | -1.4529E+01 | 5.8873E+01 | -1.6306E+02 | 3.1840E+02 |
| S5 | -5.0854E-02 | 4.0312E-01 | -3.2241E+00 | 1.6001E+01 | -5.3964E+01 | 1.2823E+02 | -2.1949E+02 |
| S6 | -3.6903E-02 | 7.5992E-03 | 4.0407E-02 | -2.2801E-01 | 1.4794E-01 | 1.1639E+00 | -3.9501E+00 |
| S7 | -1.5095E-01 | 1.5422E-01 | -9.3777E-02 | -3.0422E-01 | 1.1208E+00 | -1.9622E+00 | 2.2249E+00 |
| S8 | -2.1768E-01 | 2.3875E-01 | -2.7799E-01 | 2.1137E-01 | -5.0311E-02 | -7.6993E-02 | 9.9789E-02 |
| S9 | -7.6960E-02 | 8.5962E-02 | -1.2130E-01 | 1.2831E-01 | -1.0749E-01 | 6.8790E-02 | -3.2559E-02 |
| S10 | -6.2976E-03 | 4.4571E-02 | -4.5726E-02 | 2.6064E-02 | -1.2253E-02 | 5.3713E-03 | -2.0106E-03 |
| S11 | -2.4574E-01 | 1.2252E-01 | -3.6416E-02 | 2.0155E-04 | 4.9711E-03 | -2.3940E-03 | 6.4125E-04 |
| S12 | -2.7578E-01 | 1.8057E-01 | -1.0147E-01 | 4.4795E-02 | -1.5107E-02 | 3.8124E-03 | -7.1208E-04 |
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | 7.9684E+00 | -4.7599E+00 | 2.0333E+00 | -6.0541E-01 | 1.1930E-01 | -1.3981E-02 | 7.3742E-04 |
| S2 | 3.9122E+00 | -4.1026E+00 | 2.7225E+00 | -1.1802E+00 | 3.2532E-01 | -5.1895E-02 | 3.6540E-03 |
| S3 | 5.7451E+01 | -4.5970E+01 | 2.6238E+01 | -1.0402E+01 | 2.7176E+00 | -4.2010E-01 | 2.9067E-02 |
| S4 | -4.4531E+02 | 4.4761E+02 | -3.2045E+02 | 1.5932E+02 | -5.2245E+01 | 1.0155E+01 | -8.8564E-01 |
| S5 | 2.7360E+02 | -2.4858E+02 | 1.6287E+02 | -7.4958E+01 | 2.2998E+01 | -4.2251E+00 | 3.5172E-01 |
| S6 | 6.4707E+00 | -6.5924E+00 | 4.4430E+00 | -1.9906E+00 | 5.7189E-01 | -9.5535E-02 | 7.0649E-03 |
| S7 | -1.7591E+00 | 9.9732E-01 | -4.0716E-01 | 1.1742E-01 | -2.2743E-02 | 2.6555E-03 | -1.4118E-04 |
| S8 | -5.9770E-02 | 2.1769E-02 | -5.0837E-03 | 7.5506E-04 | -6.7205E-05 | 3.0805E-06 | -4.6406E-08 |
| S9 | 1.1219E-02 | -2.7843E-03 | 4.9001E-04 | -5.9446E-05 | 4.7151E-06 | -2.1967E-07 | 4.5520E-09 |
| S10 | 5.7589E-04 | -1.1967E-04 | 1.7577E-05 | -1.7735E-06 | 1.1686E-07 | -4.5257E-09 | 7.8075E-11 |
| S11 | -1.1313E-04 | 1.3756E-05 | -1.1627E-06 | 6.7212E-08 | -2.5377E-09 | 5.6443E-11 | -5.6116E-13 |
| S12 | 9.7715E-05 | -9.7601E-06 | 6.9824E-07 | -3.4753E-08 | 1.1406E-09 | -2.2157E-11 | 1.9277E-13 |
TABLE 6
Fig. 12 shows on-axis chromatic aberration curves of the imaging lens of the third example, which indicate deviation of the convergence focus of light rays of different wavelengths after passing through the imaging lens. Fig. 13 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of example three. Fig. 14 shows distortion curves of the imaging lens of example three, which indicate distortion magnitude values corresponding to different angles of view. Fig. 15 shows a magnification chromatic aberration curve of the imaging lens of example three, which represents a deviation of different image heights on the image formation plane after light passes through the imaging lens.
As can be seen from fig. 12 to 15, the imaging lens according to the third example can achieve good imaging quality.
Example four
As shown in fig. 16 to 20, an imaging lens of example four of the present application is described. Fig. 16 shows a schematic diagram of an imaging lens structure of example four.
As shown in fig. 16, the camera lens sequentially includes from the light incident side to the light exiting side: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.
The first lens element E1 has positive refractive power, and the surface S1 of the first lens element near the incident side is convex, and the surface S2 of the first lens element near the exit side is concave. The second lens element E2 has negative refractive power, and has a convex surface S3 on the incident side and a concave surface S4 on the exit side. The third lens element E3 has positive refractive power, and has a convex surface on the incident side S5 and a convex surface on the exit side S6. The fourth lens element E4 has negative refractive power, and has a concave surface on the incident side S7 and a concave surface on the exit side S8. The fifth lens element E5 has positive refractive power, and a surface S9 of the fifth lens element near the incident side is convex, and a surface S10 of the fifth lens element near the exit side is concave. The sixth lens element E6 has negative refractive power, and has a convex surface on the incident-side surface S11 and a concave surface on the exit-side surface S12. The filter E7 has a surface S13 on the incident side of the filter and a surface S14 on the emission side of the filter. The light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging surface S15.
In this example, the total effective focal length f of the imaging lens is 5.01mm, the total system length TTL of the imaging lens is 6.16mm, and the image height ImgH is 4.95 mm.
Table 7 shows a basic structural parameter table of the imaging lens of example four, in which the unit of the radius of curvature and the thickness/distance are millimeters (mm).
TABLE 7
Table 8 shows the high-order term coefficients that can be used for each aspherical mirror surface in example four, wherein each aspherical mirror surface type can be defined by formula (1) given in example one above.
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | -1.2392E-02 | 1.2140E-01 | -6.6238E-01 | 2.3006E+00 | -5.3554E+00 | 8.6685E+00 | -9.9874E+00 |
| S2 | -1.4538E-02 | -4.9710E-02 | 2.4631E-01 | -6.3990E-01 | 7.9144E-01 | 2.2140E-01 | -2.5240E+00 |
| S3 | -5.6383E-02 | 1.4004E-01 | -1.0421E+00 | 4.9990E+00 | -1.5777E+01 | 3.4539E+01 | -5.3807E+01 |
| S4 | -1.5393E-02 | -2.1312E-01 | 2.3480E+00 | -1.4764E+01 | 6.0348E+01 | -1.6846E+02 | 3.3131E+02 |
| S5 | -5.0896E-02 | 4.1070E-01 | -3.3125E+00 | 1.6577E+01 | -5.6362E+01 | 1.3501E+02 | -2.3294E+02 |
| S6 | -3.7601E-02 | 1.5649E-02 | -1.5536E-02 | 2.2960E-02 | -6.1745E-01 | 2.7983E+00 | -6.4483E+00 |
| S7 | -1.4934E-01 | 1.4232E-01 | -4.5118E-02 | -4.4943E-01 | 1.4395E+00 | -2.4739E+00 | 2.8241E+00 |
| S8 | -2.1336E-01 | 2.2446E-01 | -2.4604E-01 | 1.6124E-01 | 7.0836E-03 | -1.2541E-01 | 1.2974E-01 |
| S9 | -7.3710E-02 | 7.8714E-02 | -1.1185E-01 | 1.2068E-01 | -1.0391E-01 | 6.8245E-02 | -3.3005E-02 |
| S10 | -5.1208E-03 | 4.3109E-02 | -4.5578E-02 | 2.7447E-02 | -1.3920E-02 | 6.4220E-03 | -2.4389E-03 |
| S11 | -2.5406E-01 | 1.2890E-01 | -3.9680E-02 | 1.5261E-03 | 4.5182E-03 | -2.2681E-03 | 6.1437E-04 |
| S12 | -2.8694E-01 | 1.9115E-01 | -1.0875E-01 | 4.8429E-02 | -1.6427E-02 | 4.1622E-03 | -7.7999E-04 |
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | 8.2931E+00 | -4.9726E+00 | 2.1322E+00 | -6.3723E-01 | 1.2604E-01 | -1.4823E-02 | 7.8460E-04 |
| S2 | 4.5483E+00 | -4.6317E+00 | 3.0384E+00 | -1.3114E+00 | 3.6120E-01 | -5.7695E-02 | 4.0730E-03 |
| S3 | 6.0371E+01 | -4.8831E+01 | 2.8168E+01 | -1.1285E+01 | 2.9791E+00 | -4.6532E-01 | 3.2533E-02 |
| S4 | -4.6649E+02 | 4.7192E+02 | -3.3995E+02 | 1.7002E+02 | -5.6078E+01 | 1.0962E+01 | -9.6135E-01 |
| S5 | 2.9270E+02 | -2.6805E+02 | 1.7700E+02 | -8.2089E+01 | 2.5373E+01 | -4.6944E+00 | 3.9339E-01 |
| S6 | 9.2353E+00 | -8.8096E+00 | 5.7179E+00 | -2.5026E+00 | 7.0817E-01 | -1.1712E-01 | 8.6048E-03 |
| S7 | -2.2709E+00 | 1.3152E+00 | -5.4892E-01 | 1.6159E-01 | -3.1867E-02 | 3.7766E-03 | -2.0318E-04 |
| S8 | -7.3168E-02 | 2.6024E-02 | -6.0193E-03 | 8.9168E-04 | -7.9496E-05 | 3.6627E-06 | -5.5818E-08 |
| S9 | 1.1575E-02 | -2.9156E-03 | 5.1971E-04 | -6.3767E-05 | 5.1100E-06 | -2.4034E-07 | 5.0249E-09 |
| S10 | 6.9639E-04 | -1.4360E-04 | 2.0927E-05 | -2.0975E-06 | 1.3745E-07 | -5.2989E-09 | 9.1077E-11 |
| S11 | -1.0886E-04 | 1.3265E-05 | -1.1223E-06 | 6.4904E-08 | -2.4509E-09 | 5.4510E-11 | -5.4186E-13 |
| S12 | 1.0738E-04 | -1.0761E-05 | 7.7256E-07 | -3.8600E-08 | 1.2720E-09 | -2.4819E-11 | 2.1691E-13 |
TABLE 8
Fig. 17 shows on-axis chromatic aberration curves of the imaging lens of example four, which indicate deviation of the convergence focus of light rays of different wavelengths after passing through the imaging lens. Fig. 18 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of example four. Fig. 19 shows distortion curves of the imaging lens of example four, which show values of distortion magnitudes corresponding to different angles of view. Fig. 20 shows a chromatic aberration of magnification curve of the imaging lens of example four, which represents a deviation of different image heights on the imaging surface after light passes through the imaging lens.
As can be seen from fig. 17 to 20, the imaging lens according to example four can achieve good imaging quality.
Example five
As shown in fig. 21 to 25, an imaging lens of example five of the present application is described. Fig. 21 shows a schematic diagram of an imaging lens structure of example five.
As shown in fig. 21, the camera lens sequentially includes from the light incident side to the light exiting side: an aperture stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a filter E7, and an image forming surface S15.
The first lens element E1 has positive refractive power, and has a convex surface on the incident side S1 and a concave surface on the exit side S2. The second lens element E2 has negative refractive power, and its surface S3 on the incident side is convex, and its surface S4 on the exit side is concave. The third lens element E3 has positive refractive power, and has a convex surface on the incident side S5 and a convex surface on the exit side S6. The fourth lens element E4 has negative refractive power, and has a concave surface on the incident side S7 and a concave surface on the exit side S8. The fifth lens element E5 has positive refractive power, and a surface S9 of the fifth lens element near the incident side is convex, and a surface S10 of the fifth lens element near the exit side is concave. The sixth lens element E6 has negative refractive power, and a surface S11 of the sixth lens element on the incident side is convex, and a surface S12 of the sixth lens element on the exit side is concave. The filter E7 has a surface S13 on the incident side of the filter and a surface S14 on the emission side of the filter. The light from the object passes through the respective surfaces S1 to S14 in order and is finally imaged on the imaging surface S15.
In this example, the total effective focal length f of the imaging lens is 5.00mm, the total system length TTL of the imaging lens is 6.14mm, and the image height ImgH is 4.95 mm.
Table 9 shows a basic structural parameter table of the imaging lens of example five, in which the unit of the radius of curvature, thickness/distance are each millimeters (mm).
TABLE 9
Table 10 shows the high-order term coefficients that can be used for each aspherical mirror in example five, wherein each aspherical mirror type can be defined by formula (1) given in example one above.
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | -1.3900E-02 | 1.3649E-01 | -7.5004E-01 | 2.6215E+00 | -6.1421E+00 | 1.0008E+01 | -1.1610E+01 |
| S2 | -1.3574E-02 | -6.1806E-02 | 3.2313E-01 | -9.4196E-01 | 1.5705E+00 | -1.1620E+00 | -7.8255E-01 |
| S3 | -5.6669E-02 | 1.5462E-01 | -1.1607E+00 | 5.5449E+00 | -1.7416E+01 | 3.7912E+01 | -5.8698E+01 |
| S4 | -1.3032E-02 | -2.3543E-01 | 2.5424E+00 | -1.5845E+01 | 6.4354E+01 | -1.7881E+02 | 3.5049E+02 |
| S5 | -5.2388E-02 | 4.5366E-01 | -3.6858E+00 | 1.8568E+01 | -6.3416E+01 | 1.5239E+02 | -2.6351E+02 |
| S6 | -3.3699E-02 | -6.5890E-03 | 1.3646E-01 | -6.4599E-01 | 1.3182E+00 | -1.0348E+00 | -1.1108E+00 |
| S7 | -1.5160E-01 | 1.2886E-01 | 5.3557E-02 | -8.3847E-01 | 2.4179E+00 | -4.1591E+00 | 4.8847E+00 |
| S8 | -2.0974E-01 | 2.1429E-01 | -2.1530E-01 | 8.4621E-02 | 1.3601E-01 | -2.7086E-01 | 2.4197E-01 |
| S9 | -6.8033E-02 | 7.2683E-02 | -1.0844E-01 | 1.2160E-01 | -1.0769E-01 | 7.2104E-02 | -3.5357E-02 |
| S10 | -1.0933E-02 | 5.1044E-02 | -5.8023E-02 | 4.1609E-02 | -2.4704E-02 | 1.2069E-02 | -4.5305E-03 |
| S11 | -2.5420E-01 | 1.3348E-01 | -4.7100E-02 | 7.7158E-03 | 1.2697E-03 | -1.1358E-03 | 3.4386E-04 |
| S12 | -2.8352E-01 | 1.8972E-01 | -1.0900E-01 | 4.9040E-02 | -1.6779E-02 | 4.2802E-03 | -8.0642E-04 |
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | 9.7066E+00 | -5.8603E+00 | 2.5299E+00 | -7.6115E-01 | 1.5153E-01 | -1.7933E-02 | 9.5497E-04 |
| S2 | 2.9708E+00 | -3.6006E+00 | 2.5568E+00 | -1.1548E+00 | 3.2754E-01 | -5.3401E-02 | 3.8272E-03 |
| S3 | 6.5435E+01 | -5.2578E+01 | 3.0126E+01 | -1.1987E+01 | 3.1419E+00 | -4.8710E-01 | 3.3785E-02 |
| S4 | -4.9230E+02 | 4.9720E+02 | -3.5776E+02 | 1.7882E+02 | -5.8962E+01 | 1.1525E+01 | -1.0110E+00 |
| S5 | 3.3155E+02 | -3.0379E+02 | 2.0054E+02 | -9.2900E+01 | 2.8658E+01 | -5.2874E+00 | 4.4148E-01 |
| S6 | 3.9334E+00 | -5.0438E+00 | 3.8255E+00 | -1.8480E+00 | 5.6056E-01 | -9.7712E-02 | 7.4853E-03 |
| S7 | -4.0920E+00 | 2.4837E+00 | -1.0884E+00 | 3.3616E-01 | -6.9423E-02 | 8.5986E-03 | -4.8266E-04 |
| S8 | -1.3301E-01 | 4.8129E-02 | -1.1634E-02 | 1.8503E-03 | -1.8408E-04 | 1.0211E-05 | -2.3315E-07 |
| S9 | 1.2533E-02 | -3.1845E-03 | 5.7178E-04 | -7.0574E-05 | 5.6815E-06 | -2.6804E-07 | 5.6118E-09 |
| S10 | 1.2532E-03 | -2.5051E-04 | 3.5591E-05 | -3.4976E-06 | 2.2575E-07 | -8.6014E-09 | 1.4649E-10 |
| S11 | -6.3622E-05 | 7.9160E-06 | -6.7685E-07 | 3.9328E-08 | -1.4863E-09 | 3.2988E-11 | -3.2653E-13 |
| S12 | 1.1153E-04 | -1.1227E-05 | 8.0980E-07 | -4.0669E-08 | 1.3481E-09 | -2.6485E-11 | 2.3335E-13 |
Watch 10
Fig. 22 shows on-axis chromatic aberration curves of the imaging lens of example five, which indicate deviation of the convergence focus of light rays of different wavelengths after passing through the imaging lens. Fig. 23 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of example five. Fig. 24 shows distortion curves of the imaging lens of example five, which indicate distortion magnitude values corresponding to different angles of view. Fig. 25 shows a chromatic aberration of magnification curve of the imaging lens of example five, which represents a deviation of different image heights on the imaging surface after light passes through the imaging lens.
As can be seen from fig. 22 to 25, the imaging lens according to example five can achieve good imaging quality.
To sum up, example one to example five respectively satisfy the relationships shown in table 11.
Table 11 table 12 gives effective focal lengths f of the imaging lenses of example one to example five, effective focal lengths f1 to f6 of the respective lenses, and the like.
| Parameters/examples | 1 | 2 | 3 | 4 | 5 |
| f1(mm) | 5.76 | 5.77 | 5.76 | 5.77 | 5.75 |
| f2(mm) | -27.74 | -28.15 | -29.76 | -30.77 | -32.65 |
| f3(mm) | 13.06 | 13.11 | 13.15 | 13.21 | 13.28 |
| f4(mm) | -7.06 | -7.09 | -7.36 | -7.52 | -7.90 |
| f5(mm) | 5.30 | 5.29 | 5.56 | 5.59 | 5.96 |
| f6(mm) | -5.57 | -5.55 | -5.65 | -5.58 | -5.69 |
| f(mm) | 5.04 | 5.03 | 5.03 | 5.01 | 5.00 |
| TTL(mm) | 6.20 | 6.19 | 6.18 | 6.16 | 6.14 |
| ImgH(mm) | 4.95 | 4.80 | 4.90 | 4.95 | 4.95 |
TABLE 12
The present application also provides an imaging device whose electron photosensitive element may be a photo-coupled device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS). The imaging apparatus may be a stand-alone imaging device such as a digital camera, or may be an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the above-described image pickup lens.
It is to be understood that the above-described embodiments are only a few, and not all, embodiments of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without making any creative efforts shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the accompanying drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A camera lens is characterized by sequentially comprising from a light incidence side to a light emergence side:
the first lens has positive refractive power, the surface of the first lens close to the incident side is a convex surface, and the surface of the first lens close to the emergent side is a concave surface;
the second lens has negative refractive power, the surface of the second lens close to the incident side is a convex surface, and the surface of the second lens close to the emergent side is a concave surface;
the third lens element with positive refractive power has a convex surface on the incident side and a convex surface on the emergent side;
the fourth lens has negative refractive power, the surface of the fourth lens close to the incident side is a concave surface, and the surface of the fourth lens close to the emergent side is a concave surface;
the fifth lens element with positive refractive power has a convex surface on the incident side and a concave surface on the emergent side;
the sixth lens element with negative refractive power has a convex surface on the incident side and a concave surface on the emergent side;
wherein, the on-axis distance TTL from the surface of the first lens close to the incident side to the imaging surface and the half ImgH of the diagonal length of the effective pixel area on the imaging surface satisfy: TTL/ImgH < 1.3; an air interval T34 of the third lens and the fourth lens on an optical axis and a central thickness CT4 of the fourth lens on the optical axis satisfy: 1.3< T34/CT4< 1.8.
2. The imaging lens according to claim 1, wherein an effective focal length f1 of the first lens, an effective focal length f3 of the third lens, and an effective focal length f5 of the fifth lens satisfy: 1.0< f3/(f1+ f5) < 1.5.
3. The imaging lens according to claim 1, wherein an effective focal length f2 of the second lens, an effective focal length f4 of the fourth lens, and an effective focal length f6 of the sixth lens satisfy: 2.0< f2/(f4+ f6) < 2.6.
4. The imaging lens according to claim 1, wherein a curvature radius R1 of a surface on the incident side of the first lens, a curvature radius R2 of a surface on the exit side of the first lens, a curvature radius R3 of a surface on the incident side of the second lens, and a curvature radius R4 of a surface on the exit side of the second lens satisfy: 1.1< R2/R1-R3/R4< 1.5.
5. The imaging lens according to claim 1, wherein a radius of curvature R5 of a surface of the third lens on the incident side and a radius of curvature R6 of a surface of the third lens on the exit side satisfy: 1.2< (R5-R6)/(R5+ R6) < 1.6.
6. The imaging lens according to claim 1, wherein a radius of curvature R7 of a surface of the fourth lens on the incident side and a radius of curvature R8 of a surface of the fourth lens on the exit side satisfy: 1.8< (R8-R7)/(R8+ R7) < 4.8.
7. The imaging lens according to claim 1, wherein a curvature radius R11 of a surface of the sixth lens closer to the incident side, a curvature radius R12 of a surface of the sixth lens closer to the exit side, and a curvature radius R9 of a surface of the fifth lens closer to the incident side satisfy: 1.0< (R11+ R12)/R9< 1.5.
8. The imaging lens according to claim 1, wherein a combined focal length f12 of the first lens and the second lens and a combined focal length f56 of the fifth lens and the sixth lens satisfy: 1.8< f56/f12< 3.4.
9. The imaging lens according to claim 1, wherein an on-axis distance SAG22 between an intersection point of an exit-side-closer surface of the second lens and an optical axis to an effective radius vertex of the exit-side-closer surface of the second lens, an on-axis distance SAG41 between an intersection point of an entrance-side-closer surface of the fourth lens and the optical axis to an effective radius vertex of an entrance-side-closer surface of the fourth lens, and an on-axis distance SAG42 between an intersection point of an exit-side-closer surface of the fourth lens and the optical axis to an effective radius vertex of an exit-side-closer surface of the fourth lens are satisfied:
-4.2<(SAG41+SAG42)/SAG22<-3.6。
10. the imaging lens according to claim 1, wherein a combined focal length f34 of the third lens and the fourth lens, an on-axis distance SAG61 between an intersection of a surface of the sixth lens on the incident side and an optical axis and an effective radius vertex of the surface of the sixth lens on the incident side, and an on-axis distance SAG62 between an intersection of the surface of the sixth lens on the exit side and the optical axis and an effective radius vertex of the surface of the sixth lens on the exit side satisfy: 7.2< f34/(SAG61+ SAG62) < 9.0; the center thickness CT5 of the fifth lens on the optical axis, the on-axis distance SAG51 between the intersection point of the surface of the fifth lens close to the incident side and the optical axis and the effective radius vertex of the surface of the fifth lens close to the incident side, and the on-axis distance SAG52 between the intersection point of the surface of the fifth lens close to the exit side and the optical axis and the effective radius vertex of the surface of the fifth lens close to the exit side satisfy: 0.5< (SAG51-SAG52)/CT5< 0.9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210297336.3A CN114779434A (en) | 2022-03-24 | 2022-03-24 | Camera lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210297336.3A CN114779434A (en) | 2022-03-24 | 2022-03-24 | Camera lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114779434A true CN114779434A (en) | 2022-07-22 |
Family
ID=82425696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210297336.3A Pending CN114779434A (en) | 2022-03-24 | 2022-03-24 | Camera lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114779434A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200225453A1 (en) * | 2018-06-01 | 2020-07-16 | Zhejiang Sunny Optical Co., Ltd | Imaging lens assembly |
| CN114167585A (en) * | 2021-12-15 | 2022-03-11 | 浙江舜宇光学有限公司 | Image pickup lens group |
-
2022
- 2022-03-24 CN CN202210297336.3A patent/CN114779434A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200225453A1 (en) * | 2018-06-01 | 2020-07-16 | Zhejiang Sunny Optical Co., Ltd | Imaging lens assembly |
| CN114167585A (en) * | 2021-12-15 | 2022-03-11 | 浙江舜宇光学有限公司 | Image pickup lens group |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112731625B (en) | Camera lens | |
| CN113759509B (en) | Optical imaging lens | |
| CN214669824U (en) | Optical imaging lens | |
| CN113325545B (en) | Optical imaging lens | |
| CN217181321U (en) | Optical lens group | |
| CN114779434A (en) | Camera lens | |
| CN217181316U (en) | Camera lens group | |
| CN216792562U (en) | Photographic lens group | |
| CN114594572B (en) | Optical imaging lens | |
| CN217181314U (en) | Imaging lens | |
| CN217181312U (en) | Camera lens | |
| CN217213309U (en) | Camera lens | |
| CN216792569U (en) | Imaging lens group | |
| CN216792553U (en) | Optical imaging lens | |
| CN217213295U (en) | Camera lens | |
| CN216792571U (en) | Imaging lens group | |
| CN114326047B (en) | Imaging lens | |
| CN217213296U (en) | Camera lens group | |
| CN217181319U (en) | Camera lens | |
| CN114594573B (en) | Imaging lens group | |
| CN216411710U (en) | Imaging system | |
| CN213814115U (en) | Camera lens | |
| CN217181313U (en) | Optical system | |
| CN217213297U (en) | Imaging lens group | |
| CN215297810U (en) | Optical imaging lens |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |